Can Frankel be stopped? Follow the St James's Palace Stakes live from Ascot.

16.25: Okay, we're signing off for this afternoon. If you like a bit of Twitter, keep an eye on @telegraphsport for the latest for the rest of this afternoon's card.

16.10: Mick Fitzgerald on the Beeb: "I'm sure when Tom Quelley watches this again he may ask himself: 'should I have allowed this to happen a bit more gradually?"

16.08: Winning trainer Sir Henry Cecil is not buying the line that Frankel was slightly underwhelming today: "He is getting wiser, it is good because it means I can get him to run a normal race,. He had the race done and Tom said that he wasn't at all tired."

15.50: That was closer than anyone expected. Zoffany was catching him on the line.

Willie Carson and McGrath both in agreement that Queally went a little early there. Extraordinary burst to go through the field but Frankel's stride had shortened by the end and they were gaining on him.

15.47: Okay, here we go...

Frankel back in the field. No flying start this time with Rerouted by four lengths at the moment. Here comes Frankel! Start the car!

Running away with it now - in the back straight... and he JUST HOLDS ON!

That was closer than anyone expected.

15.44: Frankel looks mightily assured, and we're into the stalls. If anyone is stopping him, the feeling is that it'll be Wootton Basset, Exacerbation, or Dubawi Gold. Big 'if' though...

15.42: Latest odds: Frankel is 30-100 Fav! That's the shortest odds on any favourite in this race since 1914, according to snooker's John Parrot.

15.30: In the King's Stand Stakes, it's a victory for Robert Cowell whose Prohibit has pipped favourite Star Witness by half a length. 15 minutes until Frankel time, and the BBC build-up has already compared him to Mike Tyson, a beast, and a Ferrari.

This is Prohibit's jockey Jim Crowley: "We were a little concerned with the rain, but it is running fine. It wasn't too crowded, but I wanted to get a run and it came perfect. I hardly needed to use my stick at all."

15.22: We've already up this afternoon with Hotspur's tip Canford Cliffs winning the Queen Anne Stakes under Richard Hughes at 11-8. Hotspur - or Jim McGrath as his mother calls him - is also on Frankel this afternoon, along with everyone else who's ever seen him race. Will they all be looking silly at 3.50? In a word, probably not. Let me know your thoughts here by emailing mike.norrish@telegraph.co.uk

15.15: Your Royal Highnesses, my Lords, Ladies, and Phil from accounts, welcome to today's Royal Ascot live blog.

At 3.45 today, we will get some indication as to whether Frankel really is the "equine Usain Bolt."

Frankel. Mention the name and even hard-bitten, seen-it-all denizens of the Turf seem to go a bit weak at the knees over the unbeaten wonder horse who last time out delivered what the sport’s historians believe to be one of the sport’s defining Classic triumphs.

The mind-boggling stalls-to-post 2,000 Guineas victory was of such grandeur over Newmarket’s Rowley Mile that it felt like the bravura equine equivalent of Usain Bolt beating his Olympic rivals out of the blocks and then utterly pulverising them."